﻿<!DOCTYPE html>
<html>
  <head>
  <meta charset="UTF-8">
    <style type="text/css">
     table{
           border-style: solid;
           border-width: 5px;
           border-color: transparent;
           border-bottom:1px black solid;
           }
      
      td.test1{
                padding:1.5cm;
            }
      td.test2{
                padding:0.5cm 2.5cm;
            }
    </style>

  </head>

<body>
  <table > 
    <tr>
      <td class="test1"> 这个边框看不到</td>    
    </tr>
  </table><br/>
  <table ="1">
    <tr>
      <td class="test2">这个边框也看不到
      </td>
    </tr>
  </table>    

<body>
</html>
